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" ... Station A, operated by NMSU CEMRC, to monitor air exiting the WIPP underground. Upper right: photo... [+] of the 14-foot diameter air exhaust shaft as it emerges from the underground and turns horizontal. The Station A building sits over the turn and continuously subsamples the exhaust air. Upper left: schematic of sampling set-up showing the three probes that subsample the exhaust air. Lower left: photo of Station A interior. Lower right: Photo of two of the four huge blowers that drive the exhaust, each one capable of over 100,000 cubic feet per minute air flow. The exhaust shaft is seen disappearing into the filter building where Station B sits. Samples collected before and after the Valentine’s Day event indicate a single puff that was trapped by this specially-designed ventilation system, as expected. The other stations showed that a small amount of radiation was released, but well below any EPA action levels. Source: CEMRC ... "